TorqFix

C8,C-Crosser (Lucas brake system) — CITROEN

C8,C-Crosser (Lucas brake system) on Citroen: 35 steps, engines 4B11(AFZ), 4B12(SFZ), DW12ME5(4HK), ES9J4S(XFX).

Workshop procedure for CITROEN — the exact step sequence and torque figures, straight from real workshop data.

35 steps 7 engine codes

🧭 Before you start

  • Opens: brake fluid

Don't miss

  • Bleeding must be done with a diagnostic tool

📋 Procedure

  1. Raise the vehicle
  2. The fluid level should be between MIN and MAX
  3. Connect the brake circuit bleeding device to the master cylinder
  4. Fill the reservoir
  5. Pressurise the system
4B11(AFZ)? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Pressure:
  2. Close the circuit
  3. Follow the procedure:
  4. Open the rear right brake caliper bleed screw
  5. Until no bubbles come out
  6. Close the bleed screw
  7. Collect the escaping fluid in a container
  8. Repeat the procedure
  9. Rear, left
  10. Front, right
  11. Front, left
  12. Close the circuit
  13. Disconnect the brake fluid replacement unit
  14. Check the operation of the brake pedal
  15. After repairs:
  16. Bleed the secondary brake circuit
  17. Bleeding must be done with a diagnostic tool
  18. Brake fluid:
  19. Top up if necessary
  20. If required:
  21. Bleed the brake system
  22. Repeat the procedure

Who makes these pages, and how

TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.

The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.

Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.

Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com

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Workshop data on this page last updated 20 Sep 2026.